Crimping-machine for boots and shoes



(No Model.)

J. W. D. FIFIELD.

GRIMPING MACHINE FOR BOOTS AND sHoEs.

Patented May 30, 1882.

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N. PETERS, Phalo-Lnhngnpmr, wm'mgwn. D. C.

' UNITED STATES PATENT OFFICE.

JOHN W. D. FIFIELD, OF NORTH BROOKFIELD, MASSACHUSETTS.

CRIIVIPING-NIACHINE FOR BOOTS AND SHOES.

SPECIFICATION forming part of Letters Patent No. 258,734, dated May 30, 1882.

Application filed February 20, 1882. (No model.)

4 of North Brookfield, county of Worcester,

State of Massachusetts, have invented an lmprovement in Grimping-lvlachines for Boots and Shoes, of which the following description, in connection with the accompanying drawings, is a specification.

This invention in crimping-machines has reference to mechanism for automatically controlling the driving-belts that actuate the pulleys and gearing which reciprocate the form or crimping-plate; also, to the combination, with the form and jaws, of means carried by and made movable with the form to enter between and separate the arms which carry the jaws, whereby. the latter are separated just as the leather to be crimped is being inserted between them, as will be hereinafter described.

This invention is an improvement on United States Patent No. 225,434, March 9,1880, and No. 246,303, August 30, 1881, to which reference may be had.

Fi gare 1 represen ts in side elevation a crimping-machine embodying my present improvements; Fig. 2, a front view thereof', and Fig. 3 a sectional detail taken on the lines xx through the arms or levers which carry the jaws.

The arms or levers al b, pivoted at a2 b2 on the frame-work A, the pivoted jaws c3 b3, and the right and left hand adjusting-screw c, to determine the nearness of the faces of the jaws to each other, are all substantially as in United States Patent N o. 225,434, referred to. Instead of the spiral spring, as therein shown, I have herein shown an india-rubber spring, c2, placed between heads c3, held in place by pointed adjusting-screws c4, the said spring keeping the front ends of the jaws or levers pressed toward each other, an d causin g the jaws a3 b3 to bear against the leather being crimped with a yielding pressure, dependent upon the force ofthe said spring.

The form d, of usual or suitable shape for the boot or shoe to be crimped, and of metal, is secured or fastened to the vertically-movable rack d2, adapted to be moved longitudinally in a suitable groove in the frame-work A, as shown in section, Fig. 3, in dotted lines, Fig.1. This rack is engaged by the gear d on the shaft d4, the latter having at opposite ends of it, as in Fig. 2, toothed gears cf.

The gear c is engaged by a pinion, e2, secured to the shaft 2, to which is also secured the beltf pulley e3, and gear f is engaged by a pinion, f2, secured on the said shaft at the side of beltpulleyfi, fast thereon. At the sides of the pulleys e3f3 are loose pulleys g l1, one of which receives one ofthe driving-beltsg2orh2, (shown in dotted lines, Fig. 2,) according to the direction of movement of the follower. The pulley h receives the belth2 when the belt g2 is on the pulley e3 and theform d is being run down, while the pulley gl will receive the belt g2 when the belt h2 is on the pulleyf3 and the form d is being raised. The belt g2, which will be a crossed belt, is embraced by the loop g3 of a belt-shipper, g4, and belt h2 by a loop, h3, of the same belt-shipper. The belts g2 h2 are driven constantly by the pulleys g5 h5, fast on shaft t', supported in bearings 3 at the top of frame A, the said shaft having on it a third fast pulley, m, andaloosepulleym. The shaftz' will be driven by a belt on the pulley m in any usual way. The rack d2, at its opposite sides, (seo Fig. 2,) has two wedges or inclines, 4 5, (shown in dotted lines,) to determine the times at which the belt-shipper will be moved automatically to keep the rack and form traveling up and down constantly. The incline 4, after the form d passes the leather down through between the jaws, Will strike an arm of a rocl -shaft,p, or a roller thereon, (shown at the right of Fig. 2,) and will cause the other arm ofthe said rockshaft to act against and move the belt-shipper to the right from its position in Fig. 2. 'lhe lower end of the incline 5, at the opposite edge of the rack-bar, just as the form reaches its highest position, acts upon an arm of the rockshaft p2, as shown at the left of Fig. 2, and

causes another arm of the said rock-shaft to move the belt-shipper into its farthest position toward the left, so that the belt h2 will be placed on the loose pulley h and belt g2 on the pulley c3, toy turn it, its pinion c2, and gear c to immediately start the rack and form downward.

In Patent No. 246,303, referred to, the jaws were separated a little, through levers and links, just as the form was entering between IOG the jaws the material to be crimped. ln this my present invention l have projected from the rack djust below the form, (see Fig. 1,) a jaw-opening wedge or projection, i', whicli,just as the lower edge ot'the form with the leather thereon is about to meet and enter between the jaws, strikes between the rollers S, one on a suitable piti or stud on each arm or lever a b, and causes the said levers to be moved away from each otherin the direction to separate the jaws a2 b2 just suiicient to permit the form to insert the leather between the jaws, when by the passage ofthe projection i' below the said rollers the spring c2 will thereafter press the jaws closely against the leather on the form being forced down between them, thus stretch ing and crimping the leather into shape. Temporarily separating the jaws in the manner described avoids tearing or injuring the upper where it bears on the lower edge ofthe form.

In Patent No. 225,431 the form was depressed positively, but was raised by a weight andehain,instead of gearing, and continuously', as herein shown.

I do not broadly claim moving the rack and form continuously up and down, as that is claimed in United States Patent No. 216,768, granted to G. Stoddard and myself.

The jaws at their lower edges will be provided with suitable thin metallic yielding plates to come in contact with the form and detach the crimped upper as the form is raised.

Such plates are shown in another application (No. 53,164) made by me for United States Patent, so need not be herein shown.

l claiml. rlhe longitudinally-movable form carrying rack having' the inclines 4 5, combined with the rock-shafts 17172, their arms, and the belt-shipper, to operate substantially as described.

2. The rael; having the inclines 4;,5, the form thereon, the rocli-shaftsp p2, and the beltshipper, combined with the toothed wheels ef, pinions eIl j, and pulleys e3 f3, to operate all substantially as described.

3. The shaft i', its loose pulley and three fast pulleys, the pulleys g 71, 03j, pinions ezf, gears ej', and pinion d2, combined with the rackbar and its form and the jaws a b, substatitially as described.

4. rlhe jaws a b and their carrying arms or levers, and projections or rollers 8 thereon, combined with the rack-bar, its projection e', and the form, substantially as and for the purpose described.

In testimony whereot'I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN V. D. FIFIELD.

Witnesses:

Jos. P. LiVERMoRE, B. J. NoYEs. 

